Thanks for replying. There are no pull-ups assembled at all. Display is directly connected to GPIO like this:
VCC -> Pin 1 (3V3)
GND -> Pin 6 (GND)
SDA -> Pin 3 (GPIO 2, I2C SDA)
SCL -> Pin 5 (GPIO 3, I2C SCL)
I know that all raspberry pis are 3v3 only, but I got a RPI 2B with 1602 I2C 5V LCD attached.
It has worked like this for over a year now![:)]( "Smile")
I guess that's still a risk so I won't do this again.
I enabled I2C with raspi-config, rebooted and found 2 buses in /dev:
/dev/i2c-1
/dev/i2c-2
None of the buses detect the display. This is the command I am using:
sudo i2cdetect -y 1 && sudo i2cdetect -y 2
I should note that I it was able to detect PCF8574 on /dev/i2c-1, so I guess there is something special to the display that rpi doesn't like.
VCC -> Pin 1 (3V3)
GND -> Pin 6 (GND)
SDA -> Pin 3 (GPIO 2, I2C SDA)
SCL -> Pin 5 (GPIO 3, I2C SCL)
I know that all raspberry pis are 3v3 only, but I got a RPI 2B with 1602 I2C 5V LCD attached.
It has worked like this for over a year now
I guess that's still a risk so I won't do this again.
I enabled I2C with raspi-config, rebooted and found 2 buses in /dev:
/dev/i2c-1
/dev/i2c-2
None of the buses detect the display. This is the command I am using:
sudo i2cdetect -y 1 && sudo i2cdetect -y 2
I should note that I it was able to detect PCF8574 on /dev/i2c-1, so I guess there is something special to the display that rpi doesn't like.
Statistics: Posted by KontraBob — Thu Jan 30, 2025 7:21 am